Hi Spike, Shane
I was about to respond to Spike mentioning that I see similar behavior.
After your post I watched a bit more.
With the latest Firefox and Quicktime enabled the only problem I experience at the moment is when the TD Ameritrade Ad displays - but only the one with the Start Now button at the bottom .....
This fires up the process "plugin-container.exe" which consumes all of the cpu cycles.
Reloading the TFC page and getting past that ad, all goes back to normal.
I have repeated this many times.
Hope this helps.
Lee